Wrong language on the Phone

i have a little Problem with some Icon 400´s. After the Update to 3.4.0(2268) i can´t change the language on the Phone.If I change the language on the web interface, the language on the phone does not change.I tried to reset the system without success.

Definitely a strange one. Can you confirm that the language is being set from the "preferences > appearance > language menu and not the landing page of the web UI? Is the on screen user interface (display and remote control) also in Polish? Since you have already performed a system reset a support case would be the next step.

i have find the problem.The language "Ceska" disappears from the web interface. If you set the language on the web interface to "German" (which is in the first place), the icon is not on the selected language but on the first language that usually comes first (Ceska).

So if you put the language in German, you get Ceska, if you put in English, German, and so on.